Initial sketching

training/models.py

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+from django.db import models
+
+from RIGS.models import RevisionMixin, Profile
+from reversion import revisions as reversion
+
+# 'shim' overtop the profile model to neatly contain all training related fields etc
+@reversion.register
+class Trainee(Profile):
+    pass
+
+# Items
+class TrainingCategory(models.Model):
+    number = models.CharField(max_length=3) # Does this 1:1 correspond with a department? I think the answer is sometimes...
+    name = models.CharField(max_length=50)
+
+
+class TrainingItem(models.Model):
+    category = models.ForeignKey('TrainingCategory', on_delete=models.CASCADE)
+    number = models.CharField(max_length=3)
+    name = models.CharField(max_length=50)
+
+
+class TrainingItemInstance(models.Model):
+    item = models.ForeignKey('TrainingItem', on_delete=models.CASCADE)
+    trainee = models.ForeignKey('Trainee', related_name='items', on_delete=models.CASCADE)    
+
+    training_started_on = models.DateField()
+    training_started_by = models.ForeignKey('Trainee', related_name='training_started', on_delete=models.CASCADE)
+    
+    training_complete_on = models.DateField()
+    training_complete_by = models.ForeignKey('Trainee', related_name='training_complete', on_delete=models.CASCADE)
+
+    passed_out_on = models.DateField()
+    passed_out_by = models.ForeignKey('Trainee', related_name='passed_out', on_delete=models.CASCADE)
+
+
+class Department(models.Model):
+    name = models.CharField(max_length=50)
+
+
+# Levels
+class TrainingLevel(models.Model, RevisionMixin):
+    requirements = models.ManyToManyField(TrainingItem)
+
+    class Meta:
+        abstract = True
+
+@reversion.register
+class TechnicalAssistant(TrainingLevel):
+    # department = models.ForeignKey('Department', on_delete=models.CASCADE)
+    pass
+
+
+@reversion.register
+class Technician(TrainingLevel):
+    department = models.ForeignKey('Department', on_delete=models.CASCADE)
+
+
+@reversion.register
+class Supervisor(TrainingLevel):
+    department = models.ForeignKey('Department', on_delete=models.CASCADE)